Description Procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	DETERMINE IF AMBIENT TEMPERATURE SENSOR OR WIRING HARNESS MALFUNCTION Access the AAT PID using the M-MDS. (Refer to ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Verify the AAT PID value. Is the AAT PID value 5 V or B+ ?	Yes	Go to Step 6.
2		No	Go to the next step.
3	INSPECT AMBIENT TEMPERATURE SENSOR CONNECTOR CONDITION Switch the ignition off. Disconnect the ambient temperature sensor connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
4		No	Go to the next step.
5	INSPECT AMBIENT TEMPERATURE SENSOR Inspect the ambient temperature sensor. (Refer to AMBIENT TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) (Refer to AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is there any malfunction?	Yes	Replace the ambient temperature sensor, then go to Step 9. (Refer to AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .) (Refer to AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
5		No	Go to Step 9.
6	DETERMINE IF AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT OR AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT MALFUNCTION Switch the ignition off. Disconnect the ambient temperature sensor connector. Access the AAT PID using the M-MDS. (Refer to ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Verify the AAT PID value. Is the AAT PID value 5 V or B+ ?	Yes	Go to the next step.
6		No	Go to Step 8.
7	INSPECT AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT Verify that the ambient temperature sensor connector is disconnected. Switch the ignition off. Disconnect the PCM connector. Inspect for continuity between ambient temperature sensor terminal A (wiring harness-side) and PCM terminal 2I (wiring harness-side). Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between ambient temperature sensor terminal A and PCM terminal 2I. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between ambient temperature sensor terminal A and PCM terminal 2I. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 9.
8	INSPECT AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the ambient temperature sensor connector is disconnected. Switch the ignition off. Disconnect the PCM connector. Inspect for continuity between ambient temperature sensor terminal B (wiring harness-side) and PCM terminal 2AJ (wiring harness-side). Is there continuity?	Yes	Replace the ambient temperature sensor, then go to the next step. (Refer to AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .) (Refer to AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between ambient temperature sensor terminal B and PCM terminal 2AJ. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED Always reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (Refer to AFTER REPAIR PROCEDURE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Perform the KOEO or KOER self test. (Refer to KOEO/KOER SELF TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (Refer to PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (Refer to AFTER REPAIR PROCEDURE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (Refer to DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
10		No	DTC troubleshooting completed.